DE102008004249A1 - Piezoelectric actuator module for fuel injection system of air-compressing, self-igniting internal-combustion engine, has protective layer surrounding outer surface of actuator body and having material, which is not completely interlaced - Google Patents
Piezoelectric actuator module for fuel injection system of air-compressing, self-igniting internal-combustion engine, has protective layer surrounding outer surface of actuator body and having material, which is not completely interlaced Download PDFInfo
- Publication number
- DE102008004249A1 DE102008004249A1 DE102008004249A DE102008004249A DE102008004249A1 DE 102008004249 A1 DE102008004249 A1 DE 102008004249A1 DE 102008004249 A DE102008004249 A DE 102008004249A DE 102008004249 A DE102008004249 A DE 102008004249A DE 102008004249 A1 DE102008004249 A1 DE 102008004249A1
- Authority
- DE
- Germany
- Prior art keywords
- protective layer
- piezoelectric actuator
- actuator module
- actuator
- fuel injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 45
- 239000011241 protective layer Substances 0.000 title claims abstract description 40
- 238000002347 injection Methods 0.000 title claims abstract description 24
- 239000007924 injection Substances 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 title claims abstract description 7
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 5
- 239000010410 layer Substances 0.000 claims abstract description 39
- 239000000919 ceramic Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- 239000011243 crosslinked material Substances 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 6
- 238000004382 potting Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 3
- 238000010348 incorporation Methods 0.000 claims description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 239000002987 primer (paints) Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0057—Means for avoiding fuel contact with valve actuator, e.g. isolating actuators by using bellows or diaphragms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
- F16K31/007—Piezo-electric stacks
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
- H10N30/883—Further insulation means against electrical, physical or chemical damage, e.g. protective coatings
Abstract
Description
Stand der TechnikState of the art
Die Erfindung betrifft ein piezoelektrisches Aktormodul für ein Brennstoffeinspritzventil und ein Brennstoffeinspritzventil mit solch einem piezoelektrischen Aktormodul. Speziell betrifft die Erfindung das Gebiet der Injektor für Brennstoffeinspritzanlagen von luftverdichtenden, selbstzündenden Brennkraftmaschinen.The The invention relates to a piezoelectric actuator module for a fuel injection valve and a fuel injection valve with such a piezoelectric actuator module. Specially concerned the invention the field of injector for fuel injection systems of air-compressing, self-igniting internal combustion engines.
Aus
der
Das
aus der
Offenbarung der ErfindungDisclosure of the invention
Das erfindungsgemäße piezoelektrische Aktormodul mit den Merkmalen des Anspruchs 1 und das erfindungsgemäße Brennstoffeinspritzventil mit den Merkmalen des Anspruchs 10 haben den Vorteil, dass eine relativ kostengünstige Herstellung ermöglicht ist, wobei ein zuverlässiger Schutz gegenüber Medien gewährleistet ist, und dass insbesondere eine hohe Zuverlässigkeit und Funktionsfähigkeit gewährleistet ist.The Piezoelectric actuator module according to the invention the features of claim 1 and the invention Have fuel injection valve with the features of claim 10 the advantage of being a relatively inexpensive manufacture allowing, while providing reliable protection is guaranteed to the media, and that in particular a high reliability and functionality guaranteed is.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen des im Anspruch 1 angegebenen piezoelektrischen Aktormoduls und des im Anspruch 10 angegebenen Brennstoffeinspritzventils möglich.By the measures listed in the dependent claims are advantageous developments of specified in claim 1 piezoelectric actuator module and specified in claim 10 Fuel injection valve possible.
In
vorteilhafter Weise kann das piezoelektrische Aktormodul in einen
Aktorraum im Inneren des Brennstoffeinspritzventils eingebaut sein,
wobei im Aktorraum unter hohem Druck stehender Brennstoff vorgesehen
ist. Durch die Schutzschicht ist gewährleistet, dass der
Aktorkörper
Das piezoelektrische Aktormodul kann zwei oder mehr an den Stirnflächen miteinander verbundene, insbesondere verklebte, Aktorkörper aufweisen, die zusammen oder getrennt voneinander jeweils mit einer Schutzschicht versehen sind.The Piezoelectric actuator module can be two or more at the end faces interconnected, in particular glued, actuator body have, which together or separately from each other with a Protective layer are provided.
Dabei kann die Schutzschicht in vorteilhafter Weise in ein Schichtsystem aus mehreren Schichten integriert werden oder auch als Einzelschicht den Aktorkörper umgeben.there The protective layer may advantageously be in a layer system be integrated from several layers or as a single layer Surround the actuator body.
Vorteilhaft
ist es, dass das nicht vollständig vernetzte Material in
der Lage ist, ein eindringendes Medium durch chemische Reaktion
zu binden. Bei dem nicht vollständig vernetzten Material
kann, es sich um ein im Ausgangszustand noch nicht oder nur teilweise
vernetztes Material handeln, das vorzugsweise polymerer Natur ist.
Speziell kann das nicht vollständig vernetzte Material
eindringende Wassermoleküle, die in der Regel im Dieselbrennstoff
enthalten sind, binden. Ferner ist es vorteilhaft, dass das nicht
vollständig vernetzte Material eindringende Medien durch
additive Vernetzung unter Einbau der Moleküle des eindringenden
Mediums bindet. Im Unterschied zu einer physikalischen Adsorption,
bei der ein Wiederfreisetzen des eingedrungenen Mediums, beispielsweise
des Wassers, unter Temperatur- oder Druckwechsel möglich
ist, verhindert die chemische Bindung eine solche Wiederfreisetzung.
Speziell kann dadurch ein Weitertransport oder ein langsames Kriechen
des eingedrungenen Mediums zu dem Aktorkörper
Vorteilhaft ist es auch, dass die Schutzschicht optional zusätzlich zumindest einen Füllstoff aufweist, der polare Medien chemisch oder physikalisch zusätzlich bindet. Dadurch ergibt sich eine vorteilhafte Ergänzung der Wirkung des nicht vollständig vernetzten Materials der Schutzschicht.Advantageous It is also that the protective layer is optional in addition at least one filler, the polar media chemically or additionally physically binds. This results an advantageous addition to the effect of not fully networked Material of the protective layer.
In vorteilhafter Weise ist die Schutzschicht als Vergussmasse ausgestaltet, die einen Zwischenraum zwischen dem Aktorkörper und einer metallischen Aktorhülse auffüllt. Dies ermöglicht auch einen Einsatz der Schutzschicht als Vergussmasse, so dass sich ein weiter Anwendungsbereich ergibt.Advantageously, the protective layer is designed as a potting compound, which fills a gap between the actuator body and a metallic actuator sleeve. This also allows the use of the protective layer as potting compound, so that results in a wide range of applications.
Ferner kann die Schutzschicht von einer flexiblen, elastischen Schicht umgeben sein, die den Aktorkörper zusätzlich gegenüber mechanischer Belastung schützt. Eine solche flexible, elastische Schicht kann insbesondere aus einem Polymer gebildet sein.Further The protective layer can be made of a flexible, elastic layer be surrounded, in addition to the actuator body protects mechanical load. Such a flexible, elastic layer may in particular be formed from a polymer.
Vorteilhaft ist auch eine Ausgestaltung, bei der der Aktorkörper mit einer Grundbeschichtung versehen ist, wobei die Schutzschicht den mit der Grundbeschichtung versehenen Aktorkörper umgibt. Je nach Ausgestaltung der Schutzschicht beziehungsweise des Schichtsystems, das die Schutzschicht aufweist, kann das piezoelektrische Aktormodul an den jeweiligen Einsatzzweck angepasst werden, beispielsweise auch für den Einsatz im Niederdruckbereich.Advantageous is also an embodiment in which the actuator body with a primer coating, wherein the protective layer the Surrounding the actuator body provided with the primer coating. ever after embodiment of the protective layer or of the layer system, which has the protective layer, the piezoelectric actuator module adapted to the particular application, for example also for use in the low pressure range.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Bevorzugte Ausführungsbeispiele der Erfindung sind in der nachfolgenden Beschreibung anhand der beigefügten Zeichnungen, in denen sich entsprechende Elemente mit übereinstimmenden Bezugszeichen versehen sind, näher erläutert. Es zeigt:preferred Embodiments of the invention are in the following Description with reference to the accompanying drawings, in which corresponding elements with matching reference numerals are provided, explained in more detail. It shows:
Ausführungsformen der Erfindungembodiments the invention
Das
Brennstoffeinspritzventil
Das
Ventilgehäuse
Außerdem
weist das Ventilgehäuse
Das
Aktormodul kann aus zwei oder mehr Aktorkörpern
Der
Aktorkörper
Über
die elektrischen Leitungen
Die
weitere Ausgestaltung des Aktormoduls
Das
piezoelektrische Aktormodul
Die Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt.The Invention is not limited to the described embodiments limited.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 10217361 A1 [0002, 0003] - DE 10217361 A1 [0002, 0003]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008004249A DE102008004249A1 (en) | 2008-01-14 | 2008-01-14 | Piezoelectric actuator module for fuel injection system of air-compressing, self-igniting internal-combustion engine, has protective layer surrounding outer surface of actuator body and having material, which is not completely interlaced |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008004249A DE102008004249A1 (en) | 2008-01-14 | 2008-01-14 | Piezoelectric actuator module for fuel injection system of air-compressing, self-igniting internal-combustion engine, has protective layer surrounding outer surface of actuator body and having material, which is not completely interlaced |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008004249A1 true DE102008004249A1 (en) | 2009-07-16 |
Family
ID=40758495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008004249A Withdrawn DE102008004249A1 (en) | 2008-01-14 | 2008-01-14 | Piezoelectric actuator module for fuel injection system of air-compressing, self-igniting internal-combustion engine, has protective layer surrounding outer surface of actuator body and having material, which is not completely interlaced |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008004249A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130068200A1 (en) * | 2011-09-15 | 2013-03-21 | Paul Reynolds | Injector Valve with Miniscule Actuator Displacement |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10217361A1 (en) | 2001-04-19 | 2002-12-05 | Denso Corp | Piezoelectric element and injector provided with it |
-
2008
- 2008-01-14 DE DE102008004249A patent/DE102008004249A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10217361A1 (en) | 2001-04-19 | 2002-12-05 | Denso Corp | Piezoelectric element and injector provided with it |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130068200A1 (en) * | 2011-09-15 | 2013-03-21 | Paul Reynolds | Injector Valve with Miniscule Actuator Displacement |
US20150285198A1 (en) * | 2011-09-15 | 2015-10-08 | Weidlinger Associates, Inc. | Injector Valve with Miniscule Actuator Displacement |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed | ||
R012 | Request for examination validly filed |
Effective date: 20141006 |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |